• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.282-282
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• 2022

Arsenic (As) is a toxic heavy metal that affects the major rice-growing regions of the world and can cause cancer in humans. Rice paddy fields in South Asia are mostly dependent on arsenic-contaminated water sources due to which rice takes up the arsenic from the soil through roots and accumulates it in plant different parts. Here, we present a quantitative trait locus (QTL) mapping study to find out candidate genes conferring As toxicity tolerance in rice (Oryza sativa L.) at the seedling stage. Three weeks old, 120 double haploid CNDH lines derived from a cross between the Indica variety Cheongcheong and the Japonica variety Nagdong and their parental lines were used by treating with 25 μM As. After 2 weeks ofAs stress, 5 traits such as; shoot length (SL), root length (RL), shoot fresh weight (SFW), root fresh weight (RFW), and chlorophyll contents (CHC) were measured. A linkage map of 12 rice chromosomes was constructed from genotypic data DH lines using 778 SSR markers. The linkage map covered a total genetic distance of 2121.7 cM of the rice genome with an average interval of 10.6 cM between markers. A total of seventeen QTLs (LOD>2) were mapped on chromosomes 1, 2, 3, 6, 7, 8, 9, 11, and 12 using composite interval mapping with trait-increasing alleles coming from both parents. Five QTLs for SL, Two QTLs for RL, Five QTLs for SHL, Three QTLs for RFW, and Two QTLs for CHC were detected. The QTLs related to CHC were selected for forther study.

• Journal of Microbiology and Biotechnology
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• 제10권6호
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• pp.776-783
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• 2000

Various alcohol yeast strains have been isolated from main mashes of Korean traditional liquors, and their genetic diversities were previously reported [23]. In this study, the strain SHY111, showing the highest alcohol production, was tested for its fermentation and sporulation characteristics. Additionally, its haploid cells were isolated and tested for their growth and fermentation patterns. The strain was identified as Saccharomyces cerevisiae based on its morphological and physiological characteristics. The sequences of the ITS(internal transcribed spacer) and 5.8S rDNA regions of S. cerevisiae SHY111 were found to be identical to those of S. cerevisiae that was obtained from through the yeast genome project. The maximum fermentation ratio obtained by the strain SHY111 (96.7%) was almost the same as that by S. cerevisiae Balyun No. 1 (96.5%) that was a little higher than that by S. cerevisiae KCCM11215(95.8%). The strain was induced for sporulation in a sporulation liquid medium using log phase cells grown in different types of pre-sporulation media, and its haploid cells were obtained by spore dissection using a micromanipulator. The majority of the spores formed a small colony on a YPD agar plate, and the haploid yeast cells derived from the strain SHY111 showed a variety of growth and alcohol fermentation patterns. It was proposed that the fermentation patterns were related to their growth phenotypes in the most haploid strains, but possible not in some strains.

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2003년도 식물바이오벤처 페스티발
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• pp.180-180
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• 2003

• 한국작물학회:학술대회논문집
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• 한국작물학회 2020년도 춘계학술대회
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• pp.145-145
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• 2020

• 한국작물학회:학술대회논문집
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• 한국작물학회 2023년도 춘계학술대회
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• pp.167-167
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• 2023

• 한국작물학회:학술대회논문집
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• 한국작물학회 2021년도 춘계학술대회
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• pp.92-92
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• 2021

• 한국작물학회지
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• 제54권2호
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• pp.165-171
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• 2009

The objective of this study was to characterize the main-effect QTLs, epistatic QTLs and QTL-by-environment interactions (QE), which are involved in the control of protein content. A population of 120 doubled haploid (DH) lines derived from a cross between 'Samgang' and 'Nagdong', was planted and determined for protein content over three years. Based on the population and a genetic linkage map of 172 markers, QTL analysis was conducted by WinQTLcart 2.5 and QTLMAPPER. Three main-effect QTLs affecting protein content of brown rice were detected from 2004 to 2006 on chromosomes 1 and 11. The qPC11.2 was repeatedly detected across two years. Seven pairs of epistatic loci were identified on eight chromosomes for protein content and collectively explained 39.15% of phenotype variation. These results suggest that epistatic effects might be an even more important component of the genetic basis for protein content and that the segregation of the DH lines for protein content could be largely explained by a few main-effect QTLs and many epistatic loci.

• 한국육종학회지
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• 제40권3호
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• pp.211-214
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• 2008

Haploid system by anther culture allows the development of homozygous lines when doubled. The response of anther culture to Basta (glufosinate) resistance was investigated on transgenic plants (cv. Anjungbyeo) in order to identify inheritance of bar gene associated with Basta. Most of the regenerated transgenic plants were sterile, and only a few plants produced viable seeds ($A_1$) in the greenhouse. The bar gene was analysis by PCR in basta resistant transgenic plant ($TA_0$). The transgenic seeds ($A_1$) were significantly germinated in Basta solution compared with non-transformed seeds. As a result of anther culture, in regenerated haploid plants, segregation ratio was 1:1 in five of eight cross combinations. In diploid plants, segregation ratio was 1:1 in seven of eight cross combinations. Although there was some differences in the cross combinations, most of the combinations had 1:1 segregation ratio which supports the theory. The difference may be a result of the small sample size or the difference of anther culture response caused by genotypic difference. Hence, when many cross combinations were anther-cultured the results would support the theory.

• 한국육종학회지
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• 제43권1호
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• pp.56-61
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• 2011

벼멸구 저항성 Bph18 유전자를 가진 SR30071-3-7-23-6-1-1-1계통과 감수성인 '새누리'를 교배하여 육성한 약배양집단 192계통에 대해 벼멸구 저항성 유전자 Bph18이 벼의 수량구성요소에 미치는 영향을 검토하였다. 벼멸구 저항성 유전자 Bph18과 밀접히 연관된 7312.T4A 마커의 유전자형을 분석한 결과, 저항성 유전자형을 가진 계통은 24계통이었고 감수성 유전자형을 가진 계통은 168계통이었다. 벼멸구 저항성 유전자 Bph18은 벼의 출수일수를 짧게하고, 간장과 수장은 길게하며 등숙율은 낮게 하는 것으로 나타났으며 벼의 수수, 수당입수, 정조천립중 및 정조수량에는 영향을 미치지 않은 것으로 보여진다.

• 미생물학회지
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• 제27권4호
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• pp.342-347
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• 1989

Fusarium 속의 20균주를 PDA 배지에서 배양하고. HCI-Giemsa 염색법을 이용하여 균사 내에서의 영양핵의 핵분열을 관찰하였고, 염색체 수를 세었다. 관찰한 모든 Fusarium 속의 균주들익 염색체 수는 4-8개 사이에 있었다. 그 중에서 3균주인 F. solari S Hongchun D4. F. moniiforme(from banana), F. raphani (from radish)는 n=8개이고, F, solani 7468(from Sydney), F, solani 7475 (from Sydney), F, oxyporum (from tomato), F, oxyporum(from tomato). F F. roseum(from rice), F, sporotrichioides C. Jungsun 1, F. avenaceum C Kosung 6. F, avenaceum46039 등의 7균주에서는 n=7개였다 F. monilzfonne (from rice), F. graminellrum, F. probiferatum 6787(from Sydney), F. anguioides ATCC20351의 5균주는 n=6개 F. moniliforme NRRL2284. F. poae NRRL3287. F. tricintum NRRL 3299의 3균주는 n=5개였고 가장 적은 수의 n=4개인 균주로는 F. sporotrichioides NRRL3510과 F. equiscli KFCC 11843 IFO 030198의 3균주였다. 이상의 균주들의 염색체 수를 비교 고찰할 때 Fusarium 속의 기본 염색체 수는 반수체가 4개이며 종 분화과정에서 이수체와 배수체가 되었을 것으로 추론된다.